bmw 3.0 cls gr5 "leich" vintage series version = 1980 boost (on sale) to B class
nizmo limited offer version = 4700 boost to A class
mitsubishi eclipse gs-t = 2200 boost to C class
...And 2 car slots
...Or would keep the boost for car slots (is my preferred opinion)
EDIT: The boost price of this cars will change soon (bad luck the elite gs-t is no more on sale)